/* * mpc7448_hpc2.c * * Board setup routines for the Freescale mpc7448hpc2(taiga) platform * * Author: Jacob Pan * jacob.pan@freescale.com * Author: Xianghua Xiao * x.xiao@freescale.com * Maintainer: Roy Zang * Add Flat Device Tree support fot mpc7448hpc2 board * * Copyright 2004-2006 Freescale Semiconductor, Inc. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "mpc7448_hpc2.h" #include #include #undef DEBUG #ifdef DEBUG #define DBG(fmt...) do { printk(fmt); } while(0) #else #define DBG(fmt...) do { } while(0) #endif #ifndef CONFIG_PCI isa_io_base = MPC7448_HPC2_ISA_IO_BASE; isa_mem_base = MPC7448_HPC2_ISA_MEM_BASE; pci_dram_offset = MPC7448_HPC2_PCI_MEM_OFFSET; #endif extern int tsi108_setup_pci(struct device_node *dev); extern void _nmask_and_or_msr(unsigned long nmask, unsigned long or_val); extern void tsi108_pci_int_init(void); extern void tsi108_irq_cascade(unsigned int irq, struct irq_desc *desc, struct pt_regs *regs); int mpc7448_hpc2_exclude_device(u_char bus, u_char devfn) { if (bus == 0 && PCI_SLOT(devfn) == 0) return PCIBIOS_DEVICE_NOT_FOUND; else return PCIBIOS_SUCCESSFUL; } /* * find pci slot by devfn in interrupt map of OF tree */ u8 find_slot_by_devfn(unsigned int *interrupt_map, unsigned int devfn) { int i; unsigned int tmp; for (i = 0; i < 4; i++){ tmp = interrupt_map[i*4*7]; if ((tmp >> 11) == (devfn >> 3)) return i; } return i; } /* * Scans the interrupt map for pci device */ void mpc7448_hpc2_fixup_irq(struct pci_dev *dev) { struct pci_controller *hose; struct device_node *node; const unsigned int *interrupt; int busnr; int len; u8 slot; u8 pin; /* Lookup the hose */ busnr = dev->bus->number; hose = pci_bus_to_hose(busnr); if (!hose) printk(KERN_ERR "No pci hose found\n"); /* Check it has an OF node associated */ node = (struct device_node *) hose->arch_data; if (!node) printk(KERN_ERR "No pci node found\n"); interrupt = get_property(node, "interrupt-map", &len); slot = find_slot_by_devfn(interrupt, dev->devfn); pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin); if (pin == 0 || pin > 4) pin = 1; pin--; dev->irq = interrupt[slot*4*7 + pin*7 + 5]; DBG("TSI_PCI: dev->irq = 0x%x\n", dev->irq); } /* temporary pci irq map fixup*/ void __init mpc7448_hpc2_pcibios_fixup(void) { struct pci_dev *dev = NULL; for_each_pci_dev(dev) { mpc7448_hpc2_fixup_irq(dev); pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq); } } static void __init mpc7448_hpc2_setup_arch(void) { struct device_node *cpu; struct device_node *np; if (ppc_md.progress) ppc_md.progress("mpc7448_hpc2_setup_arch():set_bridge", 0); cpu = of_find_node_by_type(NULL, "cpu"); if (cpu != 0) { const unsigned int *fp; fp = get_property(cpu, "clock-frequency", NULL); if (fp != 0) loops_per_jiffy = *fp / HZ; else loops_per_jiffy = 50000000 / HZ; of_node_put(cpu); } tsi108_csr_vir_base = get_vir_csrbase(); #ifdef CONFIG_ROOT_NFS ROOT_DEV = Root_NFS; #else ROOT_DEV = Root_HDA1; #endif #ifdef CONFIG_BLK_DEV_INITRD ROOT_DEV = Root_RAM0; #endif /* setup PCI host bridge */ #ifdef CONFIG_PCI for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;) tsi108_setup_pci(np); ppc_md.pci_exclude_device = mpc7448_hpc2_exclude_device; if (ppc_md.progress) ppc_md.progress("tsi108: resources set", 0x100); #endif printk(KERN_INFO "MPC7448HPC2 (TAIGA) Platform\n"); printk(KERN_INFO "Jointly ported by Freescale and Tundra Semiconductor\n"); printk(KERN_INFO "Enabling L2 cache then enabling the HID0 prefetch engine.\n"); } /* * Interrupt setup and service. Interrrupts on the mpc7448_hpc2 come * from the four external INT pins, PCI interrupts are routed via * PCI interrupt control registers, it generates internal IRQ23 * * Interrupt routing on the Taiga Board: * TSI108:PB_INT[0] -> CPU0:INT# * TSI108:PB_INT[1] -> CPU0:MCP# * TSI108:PB_INT[2] -> N/C * TSI108:PB_INT[3] -> N/C */ static void __init mpc7448_hpc2_init_IRQ(void) { struct mpic *mpic; phys_addr_t mpic_paddr = 0; unsigned int cascade_pci_irq; struct device_node *tsi_pci; struct device_node *tsi_pic; tsi_pic = of_find_node_by_type(NULL, "open-pic"); if (tsi_pic) { unsigned int size; void *prop = get_property(tsi_pic, "reg", &size); mpic_paddr = of_translate_address(tsi_pic, prop); } if (mpic_paddr == 0) { printk("%s: No tsi108 PIC found !\n", __FUNCTION__); return; } DBG("%s: tsi108pic phys_addr = 0x%x\n", __FUNCTION__, (u32) mpic_paddr); mpic = mpic_alloc(tsi_pic, mpic_paddr, MPIC_PRIMARY | MPIC_BIG_ENDIAN | MPIC_WANTS_RESET | MPIC_SPV_EOI | MPIC_MOD_ID(MPIC_ID_TSI108), 0, /* num_sources used */ 0, /* num_sources used */ "Tsi108_PIC"); BUG_ON(mpic == NULL); /* XXXX */ mpic_init(mpic); tsi_pci = of_find_node_by_type(NULL, "pci"); if (tsi_pci == 0) { printk("%s: No tsi108 pci node found !\n", __FUNCTION__); return; } cascade_pci_irq = irq_of_parse_and_map(tsi_pci, 0); set_irq_data(cascade_pci_irq, mpic); set_irq_chained_handler(cascade_pci_irq, tsi108_irq_cascade); tsi108_pci_int_init(); /* Configure MPIC outputs to CPU0 */ tsi108_write_reg(TSI108_MPIC_OFFSET + 0x30c, 0); of_node_put(tsi_pic); } void mpc7448_hpc2_show_cpuinfo(struct seq_file *m) { seq_printf(m, "vendor\t\t: Freescale Semiconductor\n"); seq_printf(m, "machine\t\t: MPC7448hpc2\n"); } void mpc7448_hpc2_restart(char *cmd) { local_irq_disable(); /* Set exception prefix high - to the firmware */ _nmask_and_or_msr(0, MSR_IP); for (;;) ; /* Spin until reset happens */ } void mpc7448_hpc2_power_off(void) { local_irq_disable(); for (;;) ; /* No way to shut power off with software */ } void mpc7448_hpc2_halt(void) { mpc7448_hpc2_power_off(); } /* * Called very early, device-tree isn't unflattened */ static int __init mpc7448_hpc2_probe(void) { unsigned long root = of_get_flat_dt_root(); if (!of_flat_dt_is_compatible(root, "mpc74xx")) return 0; return 1; } static int mpc7448_machine_check_exception(struct pt_regs *regs) { extern void tsi108_clear_pci_cfg_error(void); const struct exception_table_entry *entry; /* Are we prepared to handle this fault */ if ((entry = search_exception_tables(regs->nip)) != NULL) { tsi108_clear_pci_cfg_error(); regs->msr |= MSR_RI; regs->nip = entry->fixup; return 1; } return 0; } define_machine(mpc7448_hpc2){ .name = "MPC7448 HPC2", .probe = mpc7448_hpc2_probe, .setup_arch = mpc7448_hpc2_setup_arch, .init_IRQ = mpc7448_hpc2_init_IRQ, .show_cpuinfo = mpc7448_hpc2_show_cpuinfo, .get_irq = mpic_get_irq, .pcibios_fixup = mpc7448_hpc2_pcibios_fixup, .restart = mpc7448_hpc2_restart, .calibrate_decr = generic_calibrate_decr, .machine_check_exception= mpc7448_machine_check_exception, .progress = udbg_progress, };